Improvement in kitchen-boilers



l @venan UNITED STATES PATENT iiJEEIcE.

WILLIAM B. SGAIFE, OF BITTSBURG, PENNSYLVANIA.

IMPROVEMENT IN KITCHEN-BOILERS.

t' Specification forming part o'f Letters Patent No.1 33,669, dated December 3, 1872 antedated November 30, 1872.

CAsE Af thereon.

` The nature of my invention consists in pro-- viding anew article of manufacture, viz., a

' kitchen-boiler, the ends or heads being secured in the cylinder or body of the kitchenboiler by flaring out the end of the cylinder `or body and then placing thetiange of the end or head over the flared-out portion, and contracting it so'as to form the joint between the lia-nge of the head and the flared portion of the cylinder or body, and -then brazing said joint, and rabbeting, riveting, and brazing the joint or joints in the body or cylindrical portion of the boiler.

To enable others skilled in the art to make and use myinvention, I will proceed' to describe more fully its construction.

In' the accompanying drawing which forms part of my specification, Fighure 1 is a side elevation of my improved kitchen-boiler; Fig. 2 is a vertical and longitudinal section of the same; and Fig. 3 is atransverse section of the boiler at line y of Fig. l.

In the accompanying drawing, A represents the body or cylindrical portion of the boiler, the side seam fof which is vformed by forming a rabbet along one edge. ot' the sheet from which the body Ais constructed, and then titting the other edge of the sheet in the rabbet and securing the two edges in juxtaposition by means of a few rivets, after which the joint is bra-Zed. By constructing the joint f as de- 'scribed the joint on the interior of the boiler will be even and smooth, and very strong and durable. After the joint f is finished the ends of the body `A are flared or spread out7 as shown at D in Fig. 2. The ange G of the head B is placed over the lla-red or spread portionD of the body A, as indicated by the dot ted lines in Fig. 1. The liange O is then, by means of suitable tools, bent or forced in against the ared or spread portion D, as clearly shown in Fig. 2. After the heads B B are secured to the body A in the manner hereinbefore described the joint between the fiared or spread portion D and the iange U is brazed. e represents the opening for the pipes usually connected to the boiler.

The advantage of constructing kitchen-boil ers in the manner herein described and shown in the accompanying drawing consists in enabling the manufacturer to construct the boiler with yease and facility, greatly diminishing the labor and lessening the cost of making them, and at the same time producing a much superior and more durableboiler than can be Aproduced by the old Inode of constructing by riveting and the calking of the joints. By securing the headsB on the body Ain the manner hereinbefore 'described the manufacturer can readily braze the joints around the flange C, which has long been desired, for the purpose ot' avoiding the calking and testing process in the construction of kitchen-boilers.

I do not claim, broadly, daring out the end of the cylindrical portion oi' the body of a sheetmetal vessel and contracting the flange 'of its ends over such flared-out part; nor do I claim, broadly, a'brazed joint or joints in vessels constructed of sheet metal; but

Having thus described the nature and construction of my improvement, what I claim as of my invention is A new article of manufacture, viz., akitchen-boiler with the ends of its body A flared or spread out, and the flange C of its ends B contracted over the iiared or spread portion, with the joints thus formed brazed, as herein described, and for the purpose set forth.

W. B. SGAIFE.

Witnesses:

GEO. H. THOMAS, JAMES J. JoHNsToN. 

